CN213366458U

CN213366458U - Electric operating device of isolating switch

Info

Publication number: CN213366458U
Application number: CN202022722780.4U
Authority: CN
Inventors: 张宗鹏; 王琰; 张昊然; 郭海峰
Original assignee: Beijing Up Energy Electric Co ltd
Current assignee: Beijing Up Energy Electric Co ltd
Priority date: 2020-11-23
Filing date: 2020-11-23
Publication date: 2021-06-04
Anticipated expiration: 2030-11-23

Abstract

The utility model discloses an isolator's electrically-operated device, isolator's electrically-operated device includes motor (1), drive mechanism (2) and output shaft (3), and motor (1) can drive output shaft (3) rotation through drive mechanism (2), and drive mechanism (2) contain pinion (21), gear wheel (22), worm (23) and worm wheel (24) that connect gradually, and the axis of worm wheel (24) coincides with the axis of output shaft (3). The electric operating device of the isolating switch adopts the two-stage reduction mechanism to be arranged in series, thereby improving the overall reduction ratio of the transmission mechanism, and the final output torque is obtained by multiplying the output torque of the motor by the first-stage reduction factor and then multiplying the output torque by the second-stage reduction factor, thereby realizing the low-motor torque input and the large-torque output.

Description

Electric operating device of isolating switch

Technical Field

The utility model relates to an isolator technical field, specific is an isolator's electrically-operated device.

Background

An electric operating mechanism of a contact net isolating switch is a mechanical mechanism for controlling the opening and closing actions of the isolating switch in a modern railway; generally, the electric operating mechanism is divided into a manual operating mechanism and an electric operating mechanism, wherein the electric operating mechanism mainly comprises a box body, a motor, a speed reducer (or a reduction gearbox), an auxiliary contact and the like; the equipment is controlled by a remote operation system, can realize the remote control operation of the opening and closing actions of the disconnecting switch arranged in the high altitude, and achieves the purpose of switching the circuit for isolation or communication. Due to high working reliability, the electric operating mechanism is widely used for controlling the isolating switch in places such as a substation, a power plant and the like besides the railway contact network which applies the equipment in a large amount.

At present, the prior isolating switch operating mechanism at home mainly comprises a shell box body, a motor, a reduction gearbox, an output shaft, a control circuit, an auxiliary contact and other main parts; the action output of the motor is formed by a motor output shaft and a reduction gearbox input interface through a flange or a coupling, the output shaft is fixed through a reduction gearbox output flange after being reduced by the reduction gearbox, and the output shaft extends to a shell box body to be used as an action output execution end of an operating mechanism.

In the existing operating mechanism, a reduction gearbox is generally a fixed and formed reduction gearbox finished product assembly, the reduction ratio completely depends on the fixed reduction ratio of the reduction gearbox, one reduction gearbox is a planetary reduction gearbox, and the two reduction gearboxes are characterized by small volume, light weight and reduction ratio (namely transmission ratio) generally from 5: 1 to 100: 1.

SUMMERY OF THE UTILITY MODEL

In order to improve the reduction ratio, the utility model provides an isolator's electrically-operated device, this isolator's electrically-operated device adopt two-stage reduction gears to establish ties and set up to improved the overall reduction ratio of drive mechanism, final output torque then is motor output torque multiply the second grade speed reduction multiple after one-level speed reduction multiple again, has realized low motor moment of torsion input, big moment of torsion output.

The utility model provides a technical scheme that its technical problem adopted is: the electric operating device of the isolating switch comprises a motor, a transmission mechanism and an output shaft, wherein the motor can drive the output shaft to rotate through the transmission mechanism, the transmission mechanism comprises a pinion, a gearwheel, a worm and a worm wheel which are sequentially connected, and the axis of the worm wheel is superposed with the axis of the output shaft.

The pinion is fixedly sleeved outside an output shaft of the motor and meshed with the gearwheel, the gearwheel is coaxially connected and fixed with the worm, and the worm is meshed with the worm wheel.

The transmission ratio between the small gear and the big gear is 20:1-30:1, and the transmission ratio between the worm and the worm wheel is 20:1-30: 1.

The worm gear is connected with the output shaft through the friction disc assembly, and the worm gear and the friction disc assembly can synchronously rotate by taking the axis of the output shaft as an axis or rotate relative to the friction disc assembly by taking the axis of the output shaft as an axis.

The friction disc component is in contact with the worm wheel, the friction disc component is fixedly connected with the output shaft, and sliding friction force or static friction force can exist between the friction disc component and the worm wheel.

The friction disc assembly comprises a first friction disc, a second friction disc and a worm wheel bearing disc, and the first friction disc, the worm wheel bearing disc, the worm wheel and the second friction disc are sequentially connected in a stacked mode along the axis direction of the output shaft.

The first friction disc, the worm wheel bearing disc and the second friction disc are fixedly connected through bolts, and the worm wheel bearing disc and the second friction disc clamp the worm wheel.

The electric operating device of the isolating switch also comprises a forward rotation limit switch, an arc-shaped chute is arranged at the edge of the worm wheel bearing disc, and when the output shaft rotates forwards, a contact of the forward rotation limit switch is positioned in the arc-shaped chute; when the contact of the corotation limit switch is contacted with the two ends of the arc-shaped sliding groove, the corotation limit switch can send a stop signal to the motor.

The electric operating device of the isolating switch also comprises a reverse limit switch, an arc-shaped chute is arranged at the edge of the worm wheel bearing disc, and when the output shaft rotates reversely, a contact of the reverse limit switch is positioned in the arc-shaped chute; when the contact of the reverse limit switch is contacted with the two ends of the arc-shaped sliding groove, the reverse limit switch can send a stop signal to the motor.

The electric operating device of the isolating switch further comprises a box body and an inner mounting frame, the motor and the transmission mechanism are both located in the box body, and the output shaft penetrates through the inner mounting frame.

The utility model has the advantages that: the electric operating device of the isolating switch enlarges the motor selection surface, effectively reduces the requirement on the output torque of the motor, greatly improves the rotating speed of the motor, greatly reduces the requirement of the operating mechanism on the starting torque, has more and wider selection range for the power selection of the operating mechanism, realizes that the operating mechanism can select the series motor with high rotating speed as the power input, and the series motor has the characteristic of bearing the overload capacity of a great multiple, effectively protects the damage rate and the service life of the operating mechanism caused by overload.

Drawings

The accompanying drawings, which form a part of the present application, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention and not to limit the invention.

Fig. 1 is a schematic front view of an electric operation device of the isolating switch of the present invention.

Fig. 2 is a rear view of the electric operation device of the isolating switch of the present invention.

Fig. 3 is a schematic perspective view of an electric operation device of the isolating switch of the present invention.

Fig. 4 is a schematic front view of the internal mechanism of the electric operation device of the disconnecting switch of the present invention.

Fig. 5 is a right-side view schematically illustrating an internal mechanism of the electric operation device of the disconnecting switch according to the present invention.

Fig. 6 is a schematic perspective view of an internal mechanism of an electric operation device of the disconnecting switch of the present invention.

Fig. 7 is an enlarged schematic sectional view taken along a-a in fig. 1.

Fig. 8 is a schematic illustration of the disassembly of the first friction disk, worm gear carrier plate and second friction disk.

1. A motor; 2. a transmission mechanism; 3. an output shaft; 4. a friction disc assembly; 5. a positive rotation limit switch; 6. a reverse rotation limit switch; 7. a box body; 8. an inner mounting frame;

21. a pinion gear; 22. a bull gear; 23. a worm; 24. a worm gear;

41. a first friction disk; 42. a second friction disk; 43. a worm wheel bearing disc;

431. an arc chute.

Detailed Description

It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present invention will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.

An electric operating device of an isolating switch comprises a motor 1, a transmission mechanism 2 and an output shaft 3, wherein the motor 1 can drive the output shaft 3 to rotate through the transmission mechanism 2 (namely, the motor 1 can drive the output shaft 3 to rotate by taking the axis of the output shaft 3 as a shaft through the transmission mechanism 2), the transmission mechanism 2 comprises a pinion 21, a gearwheel 22, a worm 23 and a worm wheel 24 which are sequentially connected, and the axis of the worm wheel 24 is superposed with the axis of the output shaft 3, as shown in fig. 1 to 8.

The pinion 21 and the gearwheel 22 form a primary speed reducing mechanism, the worm 23 and the worm wheel 24 form a secondary speed reducing mechanism, the two speed reducing mechanisms are connected in series, the rotating speed and the torque output by the motor are input to a power input worm part of the secondary speed reduction after being subjected to speed reduction and expansion by the primary speed reducing gear, so that the rotating speed and the torque of the transmission force received by the secondary speed reduction are the rotating speed of the output rotating speed of the motor divided by the primary speed reduction multiple, and the torque input is the torque of the output torque of the motor multiplied by the primary speed reduction multiple; when the transmission force is transmitted to the operating mechanism through the secondary worm and gear speed reducing structure again to be output, the output rotating speed at the moment is the output rotating speed of the motor divided by the primary speed reducing multiple and then divided by the secondary speed reducing multiple, and the output of the ultra-large speed reducing ratio is realized.

In the embodiment, the pinion 21 is fixedly sleeved outside the output shaft of the motor 1, the pinion 21 is coaxially connected and fixed with the output shaft of the motor 1, the pinion 21 is meshed with the gearwheel 22, the axis of the pinion 21 is parallel to the axis of the gearwheel 22, the gearwheel 22 is coaxially connected and fixed with the worm 23, the axis of the gearwheel 22 is overlapped with the axis of the worm 23, the worm 23 is meshed with the worm wheel 24, and the axis of the worm 23 is perpendicular to the axis of the worm wheel 24.

In the present embodiment, the transmission ratio (i.e., reduction ratio) between the small gear 21 and the large gear 22 may be 20:1-30:1, and the transmission ratio between the worm 23 and the worm wheel 24 may be 20:1-30: 1. The transmission ratio between the pinion 21 and the worm wheel 24 is 700:1-900:1, and the transmission ratio between the pinion 21 and the worm wheel 24 is preferably 800:1, so that the superposition effect of primary speed reduction and secondary speed reduction is realized, the effect of ultra-large speed reduction ratio is achieved, and the requirements of motor output torque and power are greatly reduced.

In the present embodiment, the worm wheel 24 and the output shaft 3 may be coaxially connected and fixed, i.e. there is no relative movement or rotation between the worm wheel 24 and the output shaft 3. Alternatively, the worm wheel 24 is connected to the output shaft 3 via the friction disk assembly 4, and the worm wheel 24 and the friction disk assembly 4 can be rotated around the axis of the output shaft 3 in synchronization, or the worm wheel 24 can be rotated around the axis of the output shaft 3 with respect to the friction disk assembly 4.

Preferably, the worm gear 24 is connected to the output shaft 3 via a friction disc assembly 4, the friction disc assembly 4 corresponding to a clutch. The friction disc assembly 4 is in contact with the worm wheel 24, the friction disc assembly 4 is coaxially and fixedly connected with the output shaft 3, and sliding friction force or static friction force can exist between the friction disc assembly 4 and the worm wheel 24. The friction disc assembly 4 is arranged to relieve internal stresses generated during overload of the system, thereby protecting the transmission structural parts and the motor from damage caused by overload.

When the sliding friction force between the friction disc assembly 4 and the worm wheel 24 is smaller than the maximum static friction force, the worm wheel 24, the friction disc assembly 4 and the output shaft 3 can synchronously rotate by taking the axis of the output shaft 3 as a shaft; when the sliding friction between the friction disc assembly 4 and the worm wheel 24 is greater than the maximum static friction, the worm wheel 24 is able to rotate relative to the friction disc assembly 4 about the axis of the output shaft 3 (i.e., the friction disc assembly 4 and the output shaft 3 will neither move nor rotate at this time).

In the present embodiment, the friction disk assembly 4 includes the first friction disk 41, the second friction disk 42, and the worm wheel receiving disk 43, and the first friction disk 41, the worm wheel receiving disk 43, the worm wheel 24, and the second friction disk 42 are sequentially laminated and connected in the axial direction of the output shaft 3. The worm wheel bearing disc 43 and the second friction disc 42 are both in direct contact with the worm wheel 24, and friction exists between the worm wheel bearing disc 43 and the second friction disc 42 and the worm wheel 24. The first friction disk 41 is connected with the output shaft 3 through a snap spring, and the connection relationship of the first friction disk 41, the second friction disk 42 and the worm wheel bearing disk 43 with the worm wheel 24 is similar to that of a conventional friction clutch.

In this embodiment, the first friction disk 41, the worm wheel carrier disk 43 and the second friction disk 42 are fixed by a bolt and nut connection, the worm wheel carrier disk 43 and the second friction disk 42 clamp the worm wheel 24, and the bolt and nut are positioned so as not to block the worm wheel 24 from rotating relative to the friction disk assembly 4. By adjusting the tightness of the bolts, the clamping force of the first and

second friction disks

41 and 42 against the worm wheel 24 can be adjusted, so as to adjust the magnitude of the sliding friction force or the static friction force between the first and

second friction disks

41 and 42 and the worm wheel 24, and the output torque of the output shaft 3.

In this embodiment, the electric operating device of the isolating switch further includes a forward rotation limit switch 5, an arc-shaped sliding groove 431 is arranged at the edge of the worm wheel bearing disc 43, and when the output shaft 3 rotates forward, a contact of the forward rotation limit switch 5 is located in the arc-shaped sliding groove 431; when the contact of the forward rotation limit switch 5 contacts with the two ends of the arc-shaped sliding groove 431, the forward rotation limit switch 5 can send a stop signal to the motor 1.

In this embodiment, the electric operating device of the disconnecting switch further includes a reverse rotation limit switch 6, an arc-shaped sliding groove 431 is arranged at the edge of the worm wheel bearing disc 43, and when the output shaft 3 is reversed, a contact of the reverse rotation limit switch 6 is located in the arc-shaped sliding groove 431; when the contact of the reverse rotation limit switch 6 contacts with both ends of the arc-shaped sliding groove 431, the reverse rotation limit switch 6 can send a stop signal to the motor 1.

The motor 1 can rotate forward or backward, and the output shaft 3 can rotate forward or backward. Through setting up arc spout 431, corotation limit switch 5 and reversal limit switch 6, can eliminate the overload hidden danger of motor and operating device transmission structure, realized operating device's motor and transmission structure can not consequently overload the condition of damaging.

In this embodiment, the electric operating device of the isolating switch further comprises a box body 7 and an inner mounting frame 8, the motor 1 and the transmission mechanism 2 are both located in the box body 7, and the output shaft 3 penetrates through the inner mounting frame 8. The transmission mechanism 2 is of an open structure in the box body 7, has no shell, and is good in heat dissipation performance and convenient to maintain.

The operation of the electrically operated device of the disconnector follows.

During normal operation, the motor 1 sequentially passes through the pinion 21, the gearwheel 22, the worm 23, the worm wheel 24 and the friction disc assembly 4 to drive the output shaft 3 to rotate by a required angle. In this process, there is a static friction force between the friction disc assembly 4 and the worm wheel 24, by which the worm wheel 24, the friction disc assembly 4, and the output shaft 3 are synchronously rotated about the axis of the output shaft 3.

When a fault occurs, if the output shaft 3 is blocked and cannot rotate, namely the friction disc assembly 4 and the output shaft 3 are kept static (neither moving nor rotating), and the motor 1 still drives the worm wheel 24 to rotate, the sliding friction force between the worm wheel 24 and the friction disc assembly 4 is greater than the maximum static friction force between the worm wheel 24 and the friction disc assembly 4, and the sliding between the worm wheel 24 and the friction disc assembly 4 occurs, namely the worm wheel 24 rotates around the axis of the output shaft 3 relative to the friction disc assembly 4 and the output shaft 3.

When the output shaft 3 rotates forwards and the contacts of the forward rotation limit switch 5 contact with the two ends of the arc-shaped sliding groove 431, the forward rotation limit switch 5 can send a stop signal to the motor 1, and then the motor 1 stops working. When the output shaft 3 rotates reversely and the contact of the reverse rotation limit switch 6 contacts with the two ends of the arc-shaped sliding groove 431, the reverse rotation limit switch 6 can send a stop signal to the motor 1, and then the motor 1 stops working.

In the electric operation device of the isolating switch, input power is subjected to primary speed reduction and then is used as input of a secondary speed reduction structure, the obtained final speed reduction ratio is a multiple of a primary speed reduction ratio multiplied by a multiple of a secondary speed reduction ratio, and the characteristics of simple opening mode structure, ultra-large speed reduction ratio, good heat dissipation effect, convenient maintenance and the like are achieved.

The above description is only for the specific embodiments of the present invention, and the scope of the present invention can not be limited by the embodiments, so that the replacement of the equivalent components or the equivalent changes and modifications made according to the protection scope of the present invention should still belong to the scope covered by the present patent. In addition, the utility model provides an between technical feature and the technical feature, between technical feature and technical scheme, technical scheme and the technical scheme all can the independent assortment use.

Claims

1. The electric operating device of the isolating switch is characterized by comprising a motor (1), a transmission mechanism (2) and an output shaft (3), wherein the motor (1) can drive the output shaft (3) to rotate through the transmission mechanism (2), the transmission mechanism (2) comprises a pinion (21), a gearwheel (22), a worm (23) and a worm wheel (24) which are sequentially connected, and the axis of the worm wheel (24) is superposed with the axis of the output shaft (3).

2. The electric operating device of the isolating switch according to claim 1, wherein the small gear (21) is fixedly sleeved outside the output shaft of the motor (1), the small gear (21) is meshed with the large gear (22), the large gear (22) is coaxially connected and fixed with the worm (23), and the worm (23) is meshed with the worm wheel (24).

3. The electrically operated device of a disconnector according to claim 1, characterized in that the transmission ratio between the small gear (21) and the large gear (22) is 20:1-30:1, and the transmission ratio between the worm (23) and the worm wheel (24) is 20:1-30: 1.

4. The electrically operated device of a disconnector according to claim 1, characterized in that the worm wheel (24) is connected to the output shaft (3) via a friction disc pack (4), the worm wheel (24) and the friction disc pack (4) being rotatable synchronously about the axis of the output shaft (3), or the worm wheel (24) being rotatable relative to the friction disc pack (4) about the axis of the output shaft (3).

5. The electrically operated device of the disconnecting switch according to claim 4, characterized in that the friction disc assembly (4) is in contact with the worm gear (24), the friction disc assembly (4) is fixedly connected with the output shaft (3), and sliding friction force or static friction force can exist between the friction disc assembly (4) and the worm gear (24).

6. The electrically operated device of the disconnecting switch according to claim 4, wherein the friction disc assembly (4) comprises a first friction disc (41), a second friction disc (42) and a worm wheel carrying disc (43), and the first friction disc (41), the worm wheel carrying disc (43), the worm wheel (24) and the second friction disc (42) are sequentially laminated in the axial direction of the output shaft (3).

7. The electric operating device of the disconnecting switch according to claim 6, wherein the first friction disk (41), the worm wheel carrier disk (43) and the second friction disk (42) are fixed by a bolt connection, and the worm wheel carrier disk (43) and the second friction disk (42) clamp the worm wheel (24).

8. The electric operating device of the isolating switch according to claim 6, characterized in that the electric operating device of the isolating switch further comprises a forward rotation limit switch (5), an arc-shaped sliding groove (431) is formed in the edge of the worm wheel bearing disc (43), and when the output shaft (3) rotates forward, a contact of the forward rotation limit switch (5) is located in the arc-shaped sliding groove (431); when the contact of the forward rotation limit switch (5) is contacted with the two ends of the arc-shaped sliding groove (431), the forward rotation limit switch (5) can send a stop signal to the motor (1).

9. The electric operating device of the isolating switch according to claim 6, characterized in that the electric operating device of the isolating switch further comprises a reverse rotation limit switch (6), the edge of the worm wheel bearing disc (43) is provided with an arc-shaped sliding groove (431), and when the output shaft (3) rotates reversely, the contact of the reverse rotation limit switch (6) is positioned in the arc-shaped sliding groove (431); when the contact of the reverse rotation limit switch (6) is contacted with the two ends of the arc-shaped sliding groove (431), the reverse rotation limit switch (6) can send a stop signal to the motor (1).

10. The electric operating device of the isolating switch according to claim 1, characterized in that the electric operating device of the isolating switch further comprises a box body (7) and an inner mounting frame (8), the motor (1) and the transmission mechanism (2) are both located in the box body (7), and the output shaft (3) penetrates through the inner mounting frame (8).